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Finding the Fourth Proportional to 217,663.74, 300,375.68 and 122,170.55

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Solution

The fourth proportional to 217,663.74, 300,375.68 and 122,170.55 is: 168,595.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,663.74 : 300,375.68 = 122,170.55 : x
  2. Step 2: Convert to fraction form
    217,663.74/300,375.68 = 122,170.55/x
  3. Step 3: Cross multiply
    217,663.74x = 300,375.68 × 122,170.55
  4. Step 4: Simplify right side
    217,663.74x = 36,697,059,919.49
  5. Step 5: Solve for x
    x = 36,697,059,919.49/217,663.74
  6. Step 6: Final answer
    x = 168,595.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.